package zhuyun.code.launcheractivity

import org.junit.Test

import org.junit.Assert.*

/**
 * Example local unit test, which will execute on the development machine (host).
 *
 * See [testing documentation](http://d.android.com/tools/testing).
 */
class ExampleUnitTest {
    @Test
    fun addition_isCorrect() {
        assertEquals(4, 2 + 2)
    }
    @Test
    fun kotlinIsTest(){
        val a:A = B()
        println(a is A)
    }
    open class A{
        open fun print(){
            println("A")
        }

    }
    class B:A(){
        override fun print() {
            println("B")
        }
    }

}
